Which of the following is not considered a type of dietary fiber?

Amylose is the correct choice as it is not considered a type of dietary fiber. It is a form of starch, which is a polysaccharide composed of glucose molecules. Starch is digestible and provides energy, unlike dietary fibers, which are largely indigestible components of plant foods important for digestive health.

In contrast, cellulose, hemicellulose, and pectin are all types of dietary fiber. Cellulose is found in the cell walls of plants and is a key component of dietary fiber that helps regulate bowel movements. Hemicellulose is a heterogeneous group of polysaccharides found in plant cell walls, contributing to the structure of the plant. Pectin is a soluble fiber commonly found in fruits, and it gels when mixed with liquid, playing a significant role in the texture of food products. Each of these fibers contributes to health by promoting gut health, regulating blood sugar levels, and supporting heart health among other benefits.